CN106346413A - Hinge shaft rapid cutting method - Google Patents
Hinge shaft rapid cutting method Download PDFInfo
- Publication number
- CN106346413A CN106346413A CN201611014239.XA CN201611014239A CN106346413A CN 106346413 A CN106346413 A CN 106346413A CN 201611014239 A CN201611014239 A CN 201611014239A CN 106346413 A CN106346413 A CN 106346413A
- Authority
- CN
- China
- Prior art keywords
- bearing pin
- hole
- pin shaft
- cutting method
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
Abstract
The invention discloses a hinge shaft rapid cutting method. The method includes the steps of melting a hole in one end of a pin shaft by means of an oxygen melting bar, stirring the oxygen melting bar around the center of the pin shaft, expanding the diameter of the hole, melting the other end of the pin shaft to be communicated with the hole to form a through hole penetrating through the pin shaft, injecting condensate into the through hole, cooling the pin shaft, connecting one end of the pin shaft with a lengthening rod, hitting the lengthening rod through a ram, and hitting the pin shaft to form a hinge joint. The hole is rapidly melted in the pin shaft through extremely-high heat output of the oxygen melting bar, the pin shaft is rapidly cooled, the gaps between the pin shaft and a shaft sleeve and between the pin shaft and a hinge joint hole are increased according to the heat expansion and cold contraction effect, the pin shaft is hit out by means of the ram, only the pin shaft is broken in the detachment process, the hinge joint hole and the shaft sleeve of a structural component are not influenced, the detachment cost of fault type pin shafts is reduced, and the high-efficiency and low-cost detachment of fault type pin shafts of cranes is achieved; the method is particularly suitable for detachment of large pin shafts with diameter of 150 mm or above and length of 1000 mm or above.
Description
Technical field
The present invention relates to a kind of fly-cutting method is and in particular to a kind of hinge point shaft fly-cutting method.
Background technology
Autocrane is a kind of crane being arranged on universal or special truck chassis.The above rotating part in chassis
Divide referred to as upper frame part.Upper frame part is made up of jib lubbing mechanism, hoisting mechanism, telescoping mechanism and slew gear.Jib lubbing mechanism exists
In crane, for changing the position of arm support pitching, increase the job area of main frame, major function is the argument changing arm,
Realize lifting and the decline of weight.
Jib lubbing mechanism is mainly made up of amplitude oil cylinder, semi-girder and turntable, constitutes a variable-angle, stable triangle knot
Structure.Three hinges are respectively hinge on the luffing that amplitude oil cylinder is connected with semi-girder, cut with scissors before the turntable that amplitude oil cylinder is connected with turntable
Point, hinge after the turntable that semi-girder is connected with turntable.Three hinges are typically connected with bearing pin, and this bearing pin is tri-joint mechanism bearing pin, this kind of
Bearing pin stock size is larger, and more than 100mm, maximum reaches 160mm to diameter, and length is generally 200mm-1000mm.
In crane amplitude variation action, tri-joint mechanism bearing pin produces relative motion with axle sleeve, and long-term work is easily because of outside ash
Dirt or grail enter and scratch bearing pin, produce the phenomenon such as abnormal sound and mill axle.In the maintenance process of crane part, need by
Semi-girder, turntable carry out separation, dismantle bearing pin, but the bearing pin scratching easily occurs the situations such as fault it is difficult to dismantle in unloading process,
Generally dismantle bearing pin using using modes such as shock, drawings.
In the case that above-mentioned mechanical force cannot directly be dismantled, then by cutting semi-girder or turntable hinge hole, broken
Bad property is disassembled.
Operation letter is had using modes such as direct hammering, drawing bearing pin or cutting structural members to fault hinge dismounting hinge pin
Just the advantages of, applied widely, but there is also following shortcoming simultaneously:
1st, the mode such as hammering, drawing dismantle the large-scale bearing pin of fault class difficulty very big, extremely inefficient.Fault class bearing pin is because of bearing pin
Surface damage or corrosion, and bearing pin is very big with the fit dimension that structural member hinge hole axle covers, simple pure using percussion, drawing etc.
Mechanical system is difficult to dismounting bearing pin, and a usual bearing pin needs one week even longer time just can disassemble.
2nd, dismantling bearing pin using cutting structural member hinge hole mode is a kind of destructive method for dismounting, the structure under dismounting
Part needs modular repair could use, or even directly scraps process, and this method for dismounting cost is very high, and waits replacement part
Cycle is also very long.
Content of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide a kind of no current, efficient, inexpensive hinge
Axle fly-cutting method.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that:
A kind of hinge point shaft fly-cutting method is it is characterised in that comprise the following steps:
S 1, using oxygen melt rod melt out hole in one end of bearing pin；
S2, melt rod along bearing pin center agitation oxygen, expand hole diameter；
S3, bearing pin other end melting, connect above-mentioned hole and form the through hole of insertion bearing pin；
S4, condensed fluid is injected in through hole, cools down bearing pin；
S5, bearing pin one terminate extension bar；
S6, using percussion hammer clash into extension bar, by knocking-on for bearing pin hinge.
Oxygen in above-mentioned steps s1 melts the outer layer covers iron sheet of rod, is multicore structure, length >=1.8m, diameter >=15mm.
Oxygen melts the high temperature that rod can produce more than 3600 DEG C under comburant oxygen, so that processed workpiece is melted rapidly and cuts.
In above-mentioned steps s1, the hole depth of bearing pin one end is more than the 1/2 of bearing pin length.
In above-mentioned steps s2, the diameter of bearing pin one end hole is less than or equal to the 1/2 of pin diameter.
In above-mentioned steps s3, the diameter of through hole is less than or equal to the 1/2 of pin diameter.Through hole accommodates condensed fluid, and condensation bearing pin is whole
While body, it is that expanding with heat and contract with cold of bearing pin provides inner space, increase the spacing with axle sleeve, hinge hole after bearing pin shrinkage.
In above-mentioned steps s4, condensed fluid is water, temperature≤50 DEG C after cooling.Rapidly cool down bearing pin, according to effect of expanding with heat and contract with cold
Should, bearing pin and axle sleeve, the fit clearance in hinge hole can be increased, facilitate bearing pin to take out.
Length >=the 300mm of extension bar in above-mentioned steps s5.
In above-mentioned steps s6, the end of extension bar connects some sections of extension bars.
The invention has benefit that: the present invention relates to reprocessing and remanufacturing the hinge point shaft fly-cutting of one of process
Method, melts excellent high thermal output Flashmelt on large-scale bearing pin using oxygen and goes out hole, and rapidly cool down bearing pin, according to flatulence of heat type
Shrinkage effect, increases bearing pin and axle sleeve, the fit clearance in hinge hole, recycles percussion hammer to tap out bearing pin from laterally being clashed into
Come, and only destroy bearing pin in unloading process, structural member hinge hole and axle sleeve are all no affected, therefore reduces fault class bearing pin and tear open
The cost unloading, realizes crane fault type bearing pin high efficiency, the dismounting of low cost；This method is particularly suited for diameter of up to
More than 150mm, length is more than the dismounting of the large-scale bearing pin of 1000mm.
Brief description
Fig. 1 is a kind of structure of the bearing pin of applicable variable amplitude mechanism for crane of hinge point shaft fly-cutting method of the present invention
Schematic diagram.
In accompanying drawing, the implication of labelling is as follows: 1, front hinge point shaft, and 2, rear hinge point shaft, 3, percussion hammer, 4, amplitude oil cylinder, 5, semi-girder knot
Structure, 6, turntable structure.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is made with specific introduction.
A kind of hinge point shaft fly-cutting method:
Before cutting, carry out operator and the protection of vehicle prepares, personnel protection needs head, face, both arms, trunk, leg, foot
Face carries out heat-insulated protection comprehensively.
Oxygen is melted rod be aligned end part of pin shaft center by the hand-held cutting gun of operator, gently holds no current cutting tool handle, on a small quantity
Oxygen supply.Another operator uses oxycetylene flame ignition, when oxygen melts rod beginning from main burning, removes oxy arc, operator increase and supply
Oxygen amount, allows oxygen melt rod burning more violent.
The oxygen of burning is melted the central part that rod aligns bearing pin one end by operator, and bearing pin core continues to increase confession after starting fusing
Oxygen amount, is sent into forward oxygen and melts rod.
When oxygen melts excellent curtailment 500mm, change oxygen and melt rod, operation is repeated.When the hole depth of melting exceedes
Behind the 1/2 of bearing pin length, stop continuing deeper into melting, stir along bearing pin center and expand hole, aperture value is less than pin diameter
1/2, prevent burn bearing pin.
Change bearing pin other end and continue melting bearing pin center, until the thorough insertion of bearing pin, form through hole.Operator stirs
Dynamic oxygen melts rod, expands hole diameter, less than the 1/2 of pin diameter.
Continue to inject toward in bearing pin through hole with cold water, quick reduction bearing pin temperature, until be cooled to less than 50 DEG C.
Weld one section of extension bar in bearing pin one end, length is not less than 300mm.
Clash into extension bar, constant impingement bearing pin using percussion hammer 3, progressively bearing pin is clashed into outward.
Observe the bearing pin being knocked, when extension bar is not enough, weld new extension bar, until bearing pin is clashed into out.
Because oxygen melts excellent heat input greatly, the core melting efficiency of bearing pin is very high, and the efficiency of therefore large-scale dismounting hinge pin carries
Much higher, average 2 hours can disassemble a bearing pin.
The high heat input of rod is melted by the way of fly-cutting goes out hole on large-scale bearing pin using oxygen, can be in other ways
Substituted, such as cut using the special flame cutting torch being deep within bearing pin hole.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, all obtained by the way of equivalent or equivalent transformation
Technical scheme, all falls within protection scope of the present invention.
Claims (8)
1. a kind of hinge point shaft fly-cutting method is it is characterised in that comprise the following steps:
S 1, using oxygen melt rod melt out hole in one end of bearing pin；
S2, melt rod along bearing pin center agitation oxygen, expand hole diameter；
S3, bearing pin other end melting, connect above-mentioned hole and form the through hole of insertion bearing pin；
S4, condensed fluid is injected in through hole, cools down bearing pin；
S5, bearing pin one terminate extension bar；
S6, using percussion hammer clash into extension bar, by knocking-on for bearing pin hinge.
2. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that the oxygen in described step s1 melts
The outer layer covers iron sheet of rod, is multicore structure, length >=1.8m, diameter >=15mm.
3. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that bearing pin one in described step s1
The hole depth at end is more than the 1/2 of bearing pin length.
4. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that bearing pin one in described step s2
The diameter in stomidium hole is less than or equal to the 1/2 of pin diameter.
5. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that through hole in described step s3
Diameter is less than or equal to the 1/2 of pin diameter.
6. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that condensed fluid in described step s4
For water, temperature≤50 DEG C after cooling.
7. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that extension bar in described step s5
Length >=300mm.
8. a kind of hinge point shaft fly-cutting method according to claim 1 is it is characterised in that extension bar in described step s6
End connect some sections of extension bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014239.XA CN106346413B (en) | 2016-11-18 | 2016-11-18 | A kind of hinge point shaft fly-cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014239.XA CN106346413B (en) | 2016-11-18 | 2016-11-18 | A kind of hinge point shaft fly-cutting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106346413A true CN106346413A (en) | 2017-01-25 |
| CN106346413B CN106346413B (en) | 2018-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611014239.XA Active CN106346413B (en) | 2016-11-18 | 2016-11-18 | A kind of hinge point shaft fly-cutting method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002019531A (en) * | 2000-07-07 | 2002-01-23 | Kasai Kogyo Co Ltd | Fixing method and jig for hinge shaft in rear parcel shelf |
| KR20080022835A (en) * | 2006-09-08 | 2008-03-12 | 두산인프라코어 주식회사 | Hinge assembly for fixing cooling fan |
| CN102001585A (en) * | 2010-12-21 | 2011-04-06 | 徐州重型机械有限公司 | Crane and frame thereof |
| CN202129601U (en) * | 2011-06-15 | 2012-02-01 | 金川集团有限公司 | Device for combustion support using oxygen gas and fast disassembly of waste and old pin shaft |
| CN105108448A (en) * | 2015-09-29 | 2015-12-02 | 莱芜钢铁集团有限公司 | Method for disassembling large part pin shaft connection |
-
2016
- 2016-11-18 CN CN201611014239.XA patent/CN106346413B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002019531A (en) * | 2000-07-07 | 2002-01-23 | Kasai Kogyo Co Ltd | Fixing method and jig for hinge shaft in rear parcel shelf |
| KR20080022835A (en) * | 2006-09-08 | 2008-03-12 | 두산인프라코어 주식회사 | Hinge assembly for fixing cooling fan |
| CN102001585A (en) * | 2010-12-21 | 2011-04-06 | 徐州重型机械有限公司 | Crane and frame thereof |
| CN202129601U (en) * | 2011-06-15 | 2012-02-01 | 金川集团有限公司 | Device for combustion support using oxygen gas and fast disassembly of waste and old pin shaft |
| CN105108448A (en) * | 2015-09-29 | 2015-12-02 | 莱芜钢铁集团有限公司 | Method for disassembling large part pin shaft connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106346413B (en) | 2018-06-26 |
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